swanson



Feb. 21, 1956 K P. SWANSON BUFFING ATTACHMENT FOR DRAWING ROLLS 2 Sheets-Sheet 1 Filed Dec. 15, 1954 lluLI IN VEN TOR. F. SWANSON KENNETH 20/575! AT TORNEYS 1956 K. P. SWANSON suwmc ATTACHMENT FOR DRAWING ROLLS 2 Sheets-Sheet 2 Filed Dec. 15, 1954 Fig. 4

IN VEN TOR.

KENNETH P. SWANSON ATTORNEYS United States Patent 6 2,735,234 I BUFFING ATTACHMENT FOR DRAWING RoLLs Kenneth P. Swanson, Abington, Mass., assignor to Progressive Engineering, Inc., Rockland, Mass, a corporation of Massachusetts Application December 15, 1954, Serial No. 475,489

10 Claims. (Cl. 51-95) This invention relates to machines for bufn'ng the cots of the drawing rolls of spinning frames to provide them with true cylindrical surfaces, and comprises a novel and improved attachment adapted to be mounted on and employed with butting machines now in use for this purpose.

My invention contemplates the employment of a cylindrical driving roll supported in axially fixed and true running axial alignment by and between the headstock and tailstock centers of a bufling machine, and work supporting means mounted on the machine and including two spaced members for rotatably supporting at its ends and parallel with the driving roll a drawing roll to be buffed. The attachment furthermore includes means for moving the work supporting means forwardly and rearwardly to bring the drawing roll into and out of peripheral driving engagement with the driving roll and into and out of position to be engaged by the grinding wheel. The fixed and true running driving roll is adapted to maintain and drive the drawing roll in true alignment while its cylindrical surface is being ground to close tolerances on the grinding wheel of the bufiing machine. The production of a novel and improved attachment of this nature, together with means for quickly mounting it on a bufiing machine, comprises the primary object of the invention.

These and other features of my invention will be more readily understood and appreciated from the following detailed description of preferred embodiments thereof, selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. l is a front elevation of a bufiing attachment embodying my invention mounted on a buffing machine of known construction,

Fig. 2 is an enlarged fragmentary plan view,

Fig. 3 is a like fragmentary plan view illustrating the parts in another position, and

Fig. 4 is an enlarged sectional View taken on line 44 of Fig. 1.

My invention embodies a bufiing attachment adapted to be quickly and conveniently mounted on and employed with commercial roll bufiing machines, particularly the Armstrong light or medium duty bufiing machines, without disturbing the machine settings or headstock and tailstock centers. The invention especially contemplates the employment of a cylindrical driving roll supported in axially fixed and true running axial alignment by and between the centers of the bufling machine, together with means for supporting parallel with the driving roll a drawing roll to be buffed, and means for moving the drawing roll into and out of grinding position and peripheral driving engagement with the driving roll. The driving roll thereupon functions to support in true alignment and rotate the drawing roll which is buffed to close cylindrical tolerances by being moved axially relative to and in peripheral grinding contact with the grinding wheel. The attachment is adapted to buff all types of anti-friction rolls from the smallest Patented Feb. 21, 1956 gauge of spinning rolls to the largest roving and draw frame rolls, including rolls with or without end gudgeons.

In the drawings I have illustrated my attachment as applied to an Armstrong bufiing machine in which 10 indicates a grinding wheel mounted to rotate on a fixed axis on the machine frame 12. A table 14 is mounted to slide on ways 15 (one shown in Fig. 4) parallel with the grinding wheel axis, a hand wheel 16 with pinion 17 and rack 18 being provided for thus moving the table. A rock shaft 20 is mounted in bearings 22 on the table 14. A headstock 24, including a motor 26, and a tailstock 28 are mounted on the shaft for rocking movement therewith. In the normal operation of the machine, the work is carried by and between the headstock and tailstock centers, and means including an adjusting knob 30 cooperating with a stop on the table are provided for limiting pivotal movement of the shaft in a direction bringing the work into contact with the grinding wheel.

The attachment comprising my invention includes a fluted driving roll 32 supported by and between the headstock and tailstock centers 33 and 34, and cooperating means mounted on the shaft 20 for supporting a drawing roll 36 to be buffed and including means for bringing the drawing roll into and out of grinding position and driving engagement with the driving roll.

The shaft 20 is of hexagonal contour (Fig. 4) and includes oppositely disposed V-flats 38 disposed horizontally as illustrated in Fig. 4. A frame 40 includes two forwardly facing V-elements 42 for engaging the shaft and two U-shaped clamping straps 43 having V-closed ends cooperating with the V-fiats to secure the frame to the shaft. A saddle 44 extends through the legs of each strap and carries a clamping screw 46 for engaging the frame, tightening of the screws being adapted to draw the V-surfaces into tight engagement and secure the frame rigidly to the shaft.

Two spaced work supporting members 48 are mounted on the frame in alignment parallel with the driving roll 32 by mechanism hereinafter described. Each such member includes a'forwardly facing horizontal guideway 50 receiving therein the head 52 of a bolt for clamping thereto a roll supporting bracket 54. Each bracket carries a forwardly extending bar 56 V-notched at 58 at its front end to receive and support the drawing roll to be buffed. Outside plates 60 are secured to the bars by screws 62 for confining the drawing roll at its ends in the manner illustrated in Fig. 2.

A pair of forwardly extending bars 64 are rigidly fixed to each work supporting member 48 by screws 65 and the two members 48 are mounted on the frame 40 for independent pivotal movement about a common axis 66. Each such mounting comprises a bolt 68 pivoted at its bottom end to the frame at said axis and carrying a block 70 at its top end disposed between the pair of bars 64 and pivoted thereto on a bolt 72, the block '70 abutting against a nut 73 on the bolt 68. A com pression spring 74 on each bolt engages at its top end against the block and at its bottom end against a nut 76 threaded to the bolt 68. Adjusting of the nut 76 is adapted to vary the compressive thrust of the spring against the block.

A T-shaped member 78 is pivoted at 79 at its bottom end to and between two rearwardly extending lugs 80 carried by the frame. An operating handle 82 is carried by and extends rearwardly from the member 78 and the top end of the member 78 carries a rod 84 loosely engaging the two work supporting members 48 thereon at its ends. Pivotal movement of the member about the axis 79 is adapted to move the drawing roll into and out of grinding position and engagement with the driving roll. A stop screw 86 carried by each bolt including the knob ittirforspivotally adjustingithershait' 20,-; thereby. properly positioningrthe driving. roll 32. and. the drawing roll ,3tiurelative to the grinding wheel .(Fig.

4)., The parts arezshown in the. roll butiingposition in full linesin Fig. 4 andbypushing or" the handle 82 downwardly the parts are moved-to the. inoperative positionwhereinthe: drawing roll is illustrated in broken lines. A; bar 92 carried by-themember7d is adapted to engage. thelugs 89m provide a stop limiting rearward movement of these parts.

A drawing roll 36 to be buffed is dropped into the V- shapedmotches SS-while the parts. are in retracted. position. The handle 32- is thcnraised to pivot the parts forwardly to. the position of Fig. 4. The. rolls 90 or 94 thereupon pass into peripheral contact with and. beneath the. driving roll '32 and are stopped at a point wherein the axisof the drawing roll is beyond. a center line connecting the driving roll axis with the axis 66. The compression springs 74 permit this. movement and serve to maintain the drawing rolls in driving contact with the driving roll beyond the line of dead center de-' scribed. and in position to contact the grinding wheel. Thusthe bolts 68 together with the springs 74 and cooperating parts comprise .springloaded toggle mechanism for resiliently maintaining the drawing roll in grinding and driving position when the work supporting members 48 are moved to their foremost position. The buffing oPCIation. is then-effected by rotation of the hand wheel 16 to move the table 14 along the ways 15 whereupon the'rolls 90 or 94 are buficd by contact with the grinding wheel.

It: is particularly pointed out that the brackets 54 are independently mounted on. the frame 48 by connecting mechanism including the bolts 68 and are loosely connected to the rod 84 whereby each bracket isv free to move forwardly to the position permitted by its stop screw' 86.' These screws are also independently adjustable; to positionspermitting simultaneous contact of the two drawing rollswith the grinding wheel, it being understood that the limit bufi'ing movement of the rolls into contact with the grinding wheel is determined and con trolledbytheknobfit). through its. control of the shaft.

Having thus disclosed my invention what I claimas new and desire to secure by Letters Patent is:

1. In a drawing roll bufiing machine embodying a grinding wheel, two rotatably mounted and axially aligned centers laterally of and axially parallel with the grinding wheel, meansproviding for relative axial movement of the. grinding.wheel and centers and power means for rotating. one ofthe centers, an attachment comprising a cylindrical, driving roll supported in axially fixed and true:.running axial alignment by and'between thecenters,.work supporting meansincluding two spaced members for rotatably supporting parallel with the driving roll-a drawing roll to be buffed, means for mounting the work supporting means in operative position on the machine for simultaneous movement of said members toward and. from the driving roll, and means for moving thework supporting means forwardly and. rearwardly respectively to bring the drawing roll into and out of peripheral driving engagement with the driving roll and into and out of position to be. engaged by the grinding wheel? 2'. The attachment d'efihedin claim 1 plus independent silien means. esasctirdr secretive. oatwasatdmem: bers for pressing and holding the drawing roll resiliently in driving engagement with the driving roll.

3. The attachment defined in claim 1 plus means including an operating handle pivotally supported on the machine and having a cross. bar. connected to said two spaced members for simultaneously moving them forwardly and rearwardly to bring. said drawingrollflinto andout of driving engagement with the driving roll.

4."ln a drawing roll gbuifing;machine. embodying a grinding wheel, two rotatably mounted and axially aligned centers laterally of and axially parallel with the grinding wheel; means providing for relative-axialmovernent of the grinding wheel and..cent er s, power means for rotating one of the centers and a shaft laterally of and parallel with the centers, an attachment comprising a cylindrical driving roll supported in axially fixed and true runningaxial alignment by and between the centers,

work supporting means includingtWo-spacedmembers for. rotatably supporting. parallel with the driving roll.- a drawing roll to be buffed,,means. mounting the work supporting means on said shaft for pivotal movement toward and from the driving roll about an axis parallel;

with thfeshaftand=driving.roll., and means for moving thework supportingmeans about said axis forwardly and. rearwardly respectively to bring the drawing rollinto and.

out of peripheral driving engagement. with the driving.

roll, and into and out of position to be engaged by the grinding wheel.

5. The attachment defined in claim 4 in which thework supporting means includes a frame having saidtwo spacedmembers independently pivoted thereto on a common axis parallelwith the shaft and. driving roll and in which the means for moving the work supporting means is'connected to and moves both said members sirnul-' taneously to-bring said drawing roll into and out of engagement with the driving roll, and. means for clamp ing the frame to the shaft.

6; The attachment defined in claim 5 plus. two compression springs respectively associated with the two spaced members-for pressing and holdingthe drawing roll resiliently in driving engagement with thedriving roll.

7. The attachment defined inclaim 6 in. which the means for moving the work supporting means about .said axis forwardly and rearwardlycomprises a- T-shaped membenconnected to the. two spaced membersand pivoted to the frame, and an operatinghandle carriedby the fr-shaped. member.

8. The attachment definedin claim 4 plus'stop means for limiting said forward movement of the work .supporting means to a position wherein the axisof the drawing roll-is beyond a; center line connecting the driving roll axis with the first-named axis, and resilient-means foe holding the work supporting means in such forward position.

9.. In a drawing roll bufling machine embodying a grinding wheel, two rotatably mounted and axially aligned centers-laterallyof and axially parallel with the grinding wheel, means providing for relative axial movement of the grinding .wheel. and centers and power means for rotating one of the centers, anattachment comprising a cylindrical drivingroll supported in axial fixed and true running. axialalignment by and between-the centers,..two.spaced members for rotatably supporting parallel with thedriving roll a drawing roll to be buffed,

meansindependently mounting said members on the machine for pivotal movement about a common axis toward and from the drivingv roll, means connected to both memgaged by the grinding wheel, and adjustable stop means carried by each member for limiting its forward movement.

10. The attachment defined in claim 1 plus spring loaded toggle mechanism for resiliently maintaining the drawing roll in said driving engagement with the driving roll and in position to be engaged by the grinding wheel.

References Cited in the file of this patent UNITED STATES PATENTS Cotchett May 26, 1953 

